diff --git a/gvaldap/gvaldap/settings/base.py b/gvaldap/gvaldap/settings/base.py
index 66e1433..4106419 100644
--- a/gvaldap/gvaldap/settings/base.py
+++ b/gvaldap/gvaldap/settings/base.py
@@ -291,5 +291,6 @@ CELERY_RESULT_BACKEND = 'amqp'
 CELERY_RESULT_PERSISTENT = True
 CELERY_TASK_RESULT_EXPIRES = None
 CELERY_ACCEPT_CONTENT = ['yaml', 'json']
+CELERY_TASK_SERAILIZER = 'json'
 CELERY_RESULT_SERIALIZER = 'json'
 ########## END CELERY CONFIGURATION